On Wed, 2017-10-04 at 02:47 +0200, Luis R. Rodriguez wrote:> 3) Lookup for kthreads which seem to generate IO -- address / review if> removal of the freezer API can be done somehow with a quescing. This> is currently for example being done on SCSI / md.> 4) Only after all the above is done should we consider this patch or some> form of it.

After having given this more thought, I think we should omit these last twosteps. Modifying the md driver such that it does not submit I/O requests whileprocesses are frozen requires either to use the freezer API or to open-code it.I think there is general agreement in the kernel community that open-coding asingle mechanism in multiple drivers is wrong. Does this mean that instead ofremoving the freezer API we should keep it and review all its users instead?